What is the latest version of Microsoft Windows Movie Maker?

Answer 1

2.1

Note that it took me longer to type the answer than to find it. It took 10 seconds to go on http://www.microsoft.com, click in the search box on the top right of the page, and type "Movie Maker" and press ENTER.

Answer 2

According to the Microsoft site, it's at 2.1
http://www.microsoft.com/windowsxp/downloads/updates/moviemaker2.mspx

EDIT: Too late for my answer, but the person above is right!
To the person above me, you have to realize that it took you even longer to answer because you decided to rant. This is a place where people come to ask questions, no matter how simple they are.